An issue with game poster for Gothic 2001 - The existing primary has been provided by a studio partner and is not editable.

I was trying to change the primary poster of Gothic (2001), but it shows: "The existing primary has been provided by a studio partner and is not editable." Frankly, it’s such a poor poster for such a classic game. The funny thing is that I already provided a good poster, and it even had a better one before: this one. Can you help replace the current cheap DVD picture? It’s painful to see it represent such a great game.